Audio unit



FIG. 1 is a top perspective view of the audio unit;

FIG. 2 is a bottom perspective view of the audio unit;

FIG. 3 is a top view of the audio unit;

FIG. 4 is a bottom view of the audio unit;

FIG. 5 is a front elevation of the audio unit;

FIG. 6 is a rear elevation of the audio unit; and,

FIG. 7 is a side elevation of the audio unit.

The broken lines shown are included for the purpose of illustrating portions of the audio unit that form no part of the claim. 

CLAIM The ornamental design for an audio unit, as shown and described. 